Whisper-phone



w. MOLLO'Y. WHISPER PHON E.

APPLICATION FILED MAR-.18, 1920- l,376,7 1'9; Patented y 3, 1921'.

lnii enfor' UNITED STATES PATENT, OFFICE. 1

WILLIAM MOLLOY, OF CHICAGO, ILLINOIS.

.-WHISPERPHOI NE.

useful improvements in a whisper-phone or an attachment for telephone instruments,

and it consists in certain peculiarities of the constructlon, novel arrangement and opera-' tion of its parts as will be hereinafter more fully set forth and specifically claimed.

The principal object of my invention is to provide an extremely inexpensive yet strong and durable attachment for telephone transmitters whereby sounds, and particularly vocal sounds, will be received and transmitted thereby in a clear and articulate manner. 7 r

A further object is to provide a device of the above mentioned general character which by reason of its novel and peculiar construction will amplify the sounds emitted thereinto and s0 direct the sound waves as to cause the whispers of the user to be distinctly and clearly heard at a considerable distance over the telephone wires.

Still another object is to provide a whisper-phone or attachment for telephone transmitters which can be readily attached to such transmitters of the ordinary or well known construction or easily removed therefrom.

Other objects and advantages of the invention will be disclosed in the following description and explanation.

In the accompanying drawing which serves to illustrate an embodiment of the invention,

Figure 1 is a' view in side elevation of a 7 portion of a transmitter of a telephone showing my whisper-phone or attachment in position thereon ready for use;

Fig. 2 is a central longitudinal sectional view taken on line 22 of Fig. 1 looking in the direction'indicated by the arrows, and

Fig. 3 is a similar view to Fig. 2 showing a modification inthe construction of the de Vice. 7

Like numerals of reference'refer to corresponding parts throughout the different views of the drawings.

The reference numeral 5 designates a portion of the transmitter of a telephone which Specification of Letters Patent. Patentd May 3, 1921, Application filed march 1a, 1920. Seria1 No. 366,9'38.

as usual is provided in one of its faces and opening'fi for the reception of a mouth piece of the ordinary "or well-known construction.

centrally thereof with a screw thread'ed My invention isdesigned to be used as a I substitutefor such mouth pieces and for the purpose of amplifying and otherwise rendering sounds transmitted over the telephone more distinct or articulate and at the same shape at one of its ends, thus providing a concavo-convex enlarged end. The circular 7 wall of the body, which wall is indicated by the numeral 8, tapers from the enlarged portion or end 9 toward the other end of the body which latter end is provided with a neck 10 having on its outer surface screwthreads 11 of a size to engage the'standard size screw-threaded openings 6 of the transmitters of telephones.

By this arrangement it is apparent that p the neck 10 can be screwed into the opening 6 of the telephone transmitter 5 where it will be securely supported in a laterally extended position therefrom. The body 7 is provided with 1 an elongated opening 12 which is located longitudinally with respect to the body and as shown is by preference elliptical in shape. This opening is employed to receive the. vocal sounds as they are emitted from the lips or made by the user of the telephone.

In Figs. 1 and 2 of the drawing, I have shown the device as being made of a single 1 piece of material such as glass, celluloid, porcelain, or the like, andin Fig. 3 an illustrated modification in the construction of the device which consists in making it of sheet metaland of three pieces, that is, of a main tubular part 13 which is tapered from one of its ends to the other thereof as shown.

. Secured to the enlarged end of the tubular piece 13 is a substantially semi-spherical} cap or member 14; the edges of which may be secured to the adjacent end edges of the tubular part 13 by means of solder or by being brazed or otherwise attached thereto.

.son of the concave surface of the enlarged Mounted on the smaller end of the tubular member 13 is another cap or end piece 15 which is reduced toward its outer end and provided with an externally screw-threaded neck 10 as in the other construction and for the same purpose.

By my improvements it will 'be seen and readily understood that the sound waves uttered or ejected into the hollow body through the opening 12 therein will by reaportion 90f the body and the circular and forwardly tapered walls thereof be directed through the neck 10 against the diaphragm of the telephone in such a way that the articulate sounds will be conveyed and delivered over thetelephone wires in a very clear, distinct, and audible manner even if the sounds are made in whispers. 7

Having thus fully described my lnvention, What I claim as new and desire to secure by Letters Patent is- 1. A device of the class described, consisting of an'elongated and tapered hollow I V body member having between its ends a longitudinally extended elongated opening and provided at one of its ends with an outlet opening and means to attach it to a telephone transmitter, said member having its end opposite said outlet enlarged and its ends an elliptically shaped opening 10-- cated longitudinally with respect to the body member, said body member provided at one of its ends with an outlet opening and means to attach it to a telephone transmitter and having its end opposite said outlet enlarged andsubstantially semi-circular in shape with its concave surface presented toward said outlet.

WILLIAM MoLL'oY. 

